The tapered part is not part of the actual case. At fist I thought there was some kind of wadcutter/semi-wadcutter bullet seated in it until I saw the hole through it. Does the hole in the lead/aluminum part go all the way through or does it bottom out (some kind of strange hollow point bullet)? Does this thing actually fit well in the pinfire cylinder? Probably some experiment given up on, or perhaps it isn't a cartridge case at all.

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